Improvement in looms



" IIN'rTign STATES PATENT @rr-Ien.,

MERRILL A. FURBUSH, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT mi LooMs."

Specification forming part of Letters Patent No. 40,683. dated November 24, 1863.

To a/ZZ whom t may concern.

Be it known that 1, MERRILL A. FURBUSH, of Philadelphia, Pennsylvania, have invented certain Improvements in Looms for Weaving Plain and Figured Fabrics; and I do hereby declare the following to be a full, clear, and eXact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to that class of fancy looms in which an endless roller chain is used for determining what warp-threads shall be lifted and depressed by means ot' reciprocatin g-bars, in combination with hook-jacks and levers connected with the heddles; and my invention consists in certain mechanism, constructed and arranged as described hereinafter, for the purpose of operating the heddlelevers and with the view of simplifying the complex machinery heretofore used for the s tme purpose.

In order that my invention may be understood by those familiar with this class of machinery, I will now proceed to describe its construction and operation.

On reference to the accompanying drawings, which form a part of this specification, Figure 1 is a side view of suficient of a loom to illustrate my improvement; Fig. 2 a view ot' Fig. 1, looking in the direction of the arrow and Fig. 3, an enlarged sectional view of Fig. l on the line -1 2.

Similarletters refer to similarparts throughoutthe several views.

A represents one of the side frames of a loom, and to this frame are secured the two guide pieces B and B', to which are adapted the sliding frames D and D', a vertical reciprocating motion being imparted to the frame D from the crank-shaft B' through the medium of a rod, E2, the upper end of the rod being connected to a pin on the frame and the lower end to a pin, which can be adjusted on the crank-wheel E.

On the outside of the guide-frame B is a stud-pin, a, to which is hun g the lever F, and adjustable stud-pin b b, projecting from one arm of this lever into the space between the lugs it' on the sliding frame D, while a similar studpin, b', projects from the other arm of the lever into the space between the lugs jj on the sliding frame D', so that the two frames must of necessity reciprocate in contrary directions to each other.

To the sliding frame D a cross-bar, K, is so secured as to be readily adjusted thereon vertically a similar adjustable cross-bar, K', being secured tothe rear of the sliding frame D'.

Gr G are the usual upper heddle-levers, hung to a pin on the frame; and G' G' are the usual lower heddle-levers, one armof each upper lever being connected to one arm of one of the lower levers by the ordinaryheddle and its strings, and the other arm ofthe same upper lever being connected to the corresponding arm of the lower lever by a rod, or, as it is termed, a hooked jack,7 H, and wire h.

It will be seen on reference to Fig. 3 that the outer ends of the levers Gr G are situated between the under side of the upper bar, d, of the frame D and the top of the upper bar, d', of the frame D'. It will also be seen that two shoulders, m and a, are formed one on one edge and the other on the opposite edge of each hook-jack, the shoulder m to be struck by the cross-bar K of the frame D during the upward movement of the latter, and the shoulder nto be struck by the cross-bar K' of the frame D' during the descent of the latter as maybe determined by the rollers on the endless chain I. As this chain of rollers has been in common use for years, and as its construction and operation on the hook-jacks H are thoroughly understood by those familiar' with looms of this class, an elaborate description will be unnecessary. It will also be understood that the under side of the cross-bar d of the frame D serves during the downward movement of the frame to depress to a given position such of the levers Gr as have been raised by the cross-bar K, and that the upper end of the frame D' serves to elevate to a given position such ot1 the levers G as hav been depressedby the cross-bar K'.

I am aware that the end accomplished by the abovedescribed parts has been heretofore attained-41S, for instance, in the loom for which Letters Patent were granted to Wm. Oromptor, November 25, 1837, and in the looms for which patents were granted to G. Cromptor, November 14, 1854, and April 27, 1858, in which patents, however, the-mechanism for operating the heddles is of a more elaborate and costly character than that which constitutes myimprovements. Itherefore Wish it to be `understood that I do not ""desirto claim, broadly, any of the parts above described as performing new functions, but that I limit my claim to the peculiar manner of constructing and arranging the machinery-that is to say, I claim as my invention and desire to secure by Letters Patentl. The reciprocating.;` frame D, with its crossbar K, and the reciprocating frame D", with its cross-bar K', both bein g arranged to slide in the guide-pieces B and Bf, or their equivalents, and to operate in conjunction with the 

